I'm not 100% sure I'm following the point, but if the point is that you can
decide to decode something other than 2125/2295 when running AFSK in order to
make the math for the conversion to the "FSK frequency" simple to do in your
head, why not? When I was first trying RTTY and running AFSK I never ran the
standard part because 2295 Hz was usually just outside my SSB filter passband.
If you're using AFSK, you will probably eventually want to use a narrow SSB
filter whose upper limit will end up being lower than 2kHz anyway, forcing you
to change to a different tone pair. From a technical standpoint, it doesn;t
much matter at all what tone pair you choose as long as the separation is 170
Hz.
Al
AB2ZY
________________________________________
From: rtty-bounces@contesting.com [rtty-bounces@contesting.com] On Behalf Of
Bill [bmarx@bellsouth.net]
Sent: Monday, February 06, 2012 3:44 PM
To: RTTY reflector
Subject: [RTTY] FSK Readouts vs AFSK
Someone sent me this comment when the subject of FSK readouts came up.
Any thoughts on his plan?
"You don't have to pick the 2.1 kHz offsets for tones, I use the
915/1085 (that is, 1 kHz +/- 85 Hz) to make the spotting arithmetic easy
(about 1 kHz)."
Bill Marx W2CQ
_______________________________________________
RTTY mailing list
RTTY@contesting.com
http://lists.contesting.com/mailman/listinfo/rtty
_______________________________________________
RTTY mailing list
RTTY@contesting.com
http://lists.contesting.com/mailman/listinfo/rtty
|